Positive-working imageable elements with chemical resistance

A positive-working, single-layer, infrared radiation-sensitive imageable element comprising a hydrophilic aluminum-containing substrate having thereon an imageable layer comprising an infrared radiation absorbing dye in an amount of from about 1 to about 30 weight %, and a first polymeric binder in an amount of from about 5 to about 20 weight % and that is represented by the following Structure (II):

• -(A)x-(B)y— (II)
• wherein A represents recurring units comprising the pendant groups represented by Structure (I) below, x is from about 10 to about 70 weight %, and y is from about 30 to about 90 weight %,
• wherein R1 and R2 each hydrogen, L is a direct bond or a linking group comprising one or more alkylene groups having 1 to 4 carbon atoms, —C(═O)—, or —S(═O)O— groups, and X is oxy or —NH—, and
• B represents recurring derived from one or more monomers selected from the group consisting of styrenic monomers, vinyl carbazole, (meth)acrylamides, (meth)acrylic acids or esters thereof, (meth)acrylonitriles, vinyl acetate, maleic anhydride, N-substituted phenylmaleimide, vinyl pyridine, vinyl pyrrolidone, and vinyl trimethoxysilane, or any combination thereof.

A positive-working, multi-layer, infrared radiation-sensitive imageable element comprising a hydrophilic aluminum-containing substrate having thereon:

• an inner layer comprising an infrared radiation absorbing compound that is present in an amount of from about 1 to about 30 weight %, and a first polymeric binder that is present in an amount of from about 60 to about 90 weight %, and
• an ink receptive outer layer comprising a second polymeric binder that is different than said first polymeric binder, and is soluble or dispersible in an alkaline developer only after exposure to imaging radiation,
• said first polymeric binder being represented by the following Structure (II):
• -(A)x-(B)y— (II)
• wherein A represents recurring units comprising the pendant groups represented by Structure (I) below, x is from about 10 to about 70 weight %, and y is from about 30 to about 90 weight %,
• wherein R1 and R2 each hydrogen, L is a direct bond or a linking group comprising one or more alkylene groups having 1 to 4 carbon atoms, —C(═O)—, or —S(═O)O— groups, and X is oxy or —NH—, and
• B represents recurring derived from one or more monomers selected from the group consisting of styrenic monomers, vinyl carbazole, (meth)acrylamides, (meth)acrylic acids or esters thereof, (meth)acrylonitriles, vinyl acetate, maleic anhydride, N-substituted phenylmaleimide, vinyl pyridine, vinyl pyrrolidone, and vinyl trimethoxysilane, or any combination thereof.